Liquid-lens system.



5a In 028 224 OR 19 9 V A. KUHLER. LIQUID LENS SYSTEM. APPLIOATIO! nun 223.9, 1012.

1,028,224, Patented June 4, 1912.

20M I 3 9m:

iii LULOHH UNITED STATES PATENT OFFICE.

AUGUST KoHLnR, or JENA, GERMANY, ASSIGNOR TO THE FIRM or CARL znrss, or JENA, GERMANY.

LIQUID-LENS SYSTEM.

Specification of Letters Patent.

Patented June 4:, 1912.

To all whom it may concern:

Be it known that I, AUGUST KoHLnR, a citizen of the German Empire, residing at Jena, Germany, have invented a new and useful Liquid-Lens System, of which the following is a specification.

The liquid-lens-system composed of two members according to the present invention is in two respects to be preferred to the usual disposition of two neighboring liquidlenses. In the first place it permits of the employment of such liquids as become turbid and are liable to form a precipitate on the glass surfaces, as is e. g. the case with water; for with the new system the liquid may be conveniently changed and all glass surfaces in contact with the liquid easily cleaned. In the second place for transforming the system into another one with two other members it is only necessary to change a single one of the principal parts of the system. Of such principal parts there are three: two vessels and a liquid filling. The two opposite sides of either vessel are of glass, in the simplest case of uniform thickness and at any rate in their operative part bodies of revolution in relation to a common axis, therefore having surfaces that may also be plane or spherical. The two vessels are unequal in size, the smaller one bein so disposed within the larger one that t e axes of both pairs of glass sides coincide, that the efi'ective parts therefore of the four glass sides by themselves form a centered optical system. When the remaining space of the outer vessel is filled with a liquid, a glass side of'the inner and a glass side of the outer vessel form with a part of the filling a liquid-lens. The vessels may both be open at the top. If the inner one is closed, the air npiy be exlmpst ed from it or it may be filledhvith a gas or gaseous mixture, e. g. again with air.

In the annexed drawing a constructional example of the new liquid-lens-system composed of two members is shown by a vertical section made along the optical axis.

The outer vessel 0 is fitted with plane glass sides 0, the inner vessel 1) with sphericoconcave glass sides 6. The axis a a of the two plane sheets of glass (2 (1 and the axis 6 b of the two curved sheets of glass 5 6 coincide. With a part of the liquid filling of the vessel a, the four glass sheets form two consecutive liquid-lenses, one lano-convex and the other convexoplane.

I claim:

A liquid-lens-system comprising two ves- AUGUST KCHLER.

Witnesses PAUL KRiiGnR, Fnrrz LANDER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

